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A toroid is filled with aluminium of susceptibility 2.3 x 10^-5. The field rises by about

A0.23 percent
B2.3 percent
C0.0023 percent
D0.000023 percent
Answer & Solution
Correct answer: C. 0.0023 percent
Fractional rise is χ = 2.3 x 10^-5, which is 0.0023 percent.
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